Perpetual calendar



July 1, 1,930.

IO I7 24 5I J. F. sTlMsoN Er AL 1,769,759

PERPETUAL CALENDAR 4 Sheets-Sheet l Filed Nov. l5, 192B II I2, I8 I9 25 26 lNvENTORs July l, 1930.

J, F. STfMSON ET AL PERPETUAL CALENDAR Filed Nov. 15, 1928 4 Sheet s-Sheet 2 INVENTORS haar /zm/cgf JFK/Nk Sr/Meafv.- M 3 ATTORNEYS July l, 1930. J. F. sTlMsoN El' AL 15ERPETUAL CALENDAR Filed Nov. 15. 192e 4 sheets-sheet INVENTORS- `luly l, 1930.

J. F. sTlMsoN ET AL PERPETUAL CALENDAR Filed NOV. l5, 1928 4 Sheets-Sheet 4 ,gli A A'rromqs;

Patented July l, 1930 UNITED STATES PATENT OFFICE JOHN EEANK'STIMSON, or PAPEETE, TAHITI, SOCIETY IsLANDs, AND TALBOT PATRICK, OE BROOKLYN, NEW YORK PEEPETUAL CALENDAR Application led November 15, 1928. Serial No. 319,522.

The present invention relates to perpetual calendars and it pertains more particularly to an lmprovement over the construction and arrangement of parts disclosed in the patent to Stimson for perpetual calendars No. 916,051, granted March 23, 1909.

It is one ofthe objectsof the present invention to simplify the construction and operation of perpetual calendars.

It is a further object of the invention so to construct a perpetual calendar that` computation ofthe Various problems may be readily carried out. Withfthe above and other objects in View which will appear as the nature of the invention is better understood, reference is had to the accompanying drawings which illustrate the invention in a preferred form and in which- Figure 1 is a view in front elevation of a perpetual calendar constructed in accordance with the present invention;

Figure 2 is a longitudinal sectional view taken on the line 2-2 of Figure 1;

25 `Figure 3 is a longitudinal sectional view taken on the line 3-3 vof Figure 2;

Figure 4 is a longitudinal sectional view taken on the line 4-4 of Figure 2; and

Figure 5 is a longitudinalV sectional View taken on the line 5,-5 of Figure 2.

Referring to the drawings by reference character 10 designates a base which may be made of any suitable rigid or semi-rigid material such, for. example, as a relatively thin y board,cardboard or the like. As will be apparent from Figure 1, thelower portion of the base 10 is printed or Otherwise divided into seven main columns 11 to form a year table.y In `these columns numerals are placed '1 indicating the dierent years of a. century, that is zero to 99 inclusive. The-Order yof numerals is so far as possible from right to left, kone for eachcolumn exceptfor the leap years which skip a column. The numerals for f the leap years are preferably designated in a particular manner, in the present instance by the use of heavy face type or they may be indicated by enclosing them in heavy blacky squares or by printing them in color as sug# i gested in the patent above identied. The

cipher, that is `the century year, is designated further by a star to call attention to the fact that this year is a leap ear only when the number of the year is divisible by 400. When it is a leap year the column khaving a solid star on the figure is used and when it is not a leap year the column having an outline star is used. Obviously other kkmeans of designating the column for these leap years may be used. In the drawing I have illustrated each column as divided into two minor columns. These columns are not of importance of themselves but are merely to provide space for two numbers side by side so that all numbers having a common lefthand digit may be placed in the same row. That is, numbers from 1 to 9 are all in the first row. Numbers from 10 to 19 in the second row. Numbers from 20`to 29 in the third, etc.

' The reference character 12 designates a suitable bearing member or the like about which is rotatably mounted a segmental member 13. This segmental member 13 is provided with a plurality Of circumferentiallyextending division lines such as, for example, 15.` This century disk which is of segmental shape, is provided with an operating tab 16 and said tab is preferably colored for a purpose to be hereinafter described. The several spaces 14 are provided with numerals designating the various centuries and this disk performs the same function or serves the same purpose as the centurydisk B in the aforementioned patent. By reference to Figure 1 it will be noted that the lines forming the columns 11 extend upwardly as designated by the reference character 17 and the century disk 13 is adapted for movement so that its radial lines will coincide with the extensions 17 of the divisional lines of the columns 11. In this manner any century desired may be moved to a column in which the year* desired of the century is. positioned in a manner toV be hereinafter described. g Also mounted on the base 10 in the sam plane with the century disk 13 there is a center bearing member 18 about which is Iotatably mounted a month disk 19. This disk carriesthe twelve months of the year arrangedcircumferentially thereof and radia-I- And ly inwardly from each month are numerals designating the number of days in said month. The periphery of this month disk 19 entends beyond the upper end of the base as designated by the reference character 2O and serves as operating means for rotating the said disk 19.

Mounted directly over the century disk 13 there is a month disk 25. This month disk is divided circumterentially by lines 26 and radially by lines 2T into spaces 28 which spaces carry preferably the abbreviations of the several months ot the year in a predetermined relation. there being duplicate sets ot the months and reading from lett to right on opposite sides ot an operating tab 30 the arrangement ot these month abbreviations is identical. This month dis t 25 is of smaller diameter than the century disk 13 and while the same overlies the century disk 13 it does not hide the printed matter carried thereby. The divisions on the month disk are such that the radial lines thereof will coincide with the radial lines on the century disk 13 so that the desired month may be brought in )loper relative position to the century and year atter the century disk has been properly set with relation to the desired year in the year table in order that the desired month may be properly associated with the century and the year selected.

Mounted adjacent to the month disk 25 there is a monthly date table 4:0 suitably divided into squares by intersecting lines 41 and 2. rThese squares are provided with mimi/ers designating the days of the month and are divided into two sets each ot which includes 1 to 31 except that the numbers l, 11. 1S and 25 are not duplicated as are each ot the other numbers but serve as their respective numbers in each set. t will be seen that the numbers in each set occupyv the same relative position to each other ith the eX- ception of these above-mentioned tour numbers.

The upper portion ot the month disk 25 is provided vith gear teeth 45 and these gear eeth mesh with the teeth 116 of a rack 47 ,vhich rack et? is carried by the nonthly date table, it being understood that the monthly lat, able is movable transversely of the 9. Thus. it will be seen that the date table is operated simultanetl operation ot the month disk l :ted ina plane above the month disk 25 there are two Visks 50 and 51 rotatably mounted about a central bearing 52. These two members are provided with numerals which are adapted to be positioned so that the year may be indicated when the calendar is used in the manner of ordinary calendars instead of for working out the various problems for which the calendar is capable. The

omer member 51 projects beyond thek base 10 as designated at 54 and this projectinfr part forms the means by which this mem er is rotated. The inner member is provided with small recesses or depressions 55 into which an instrument may be inserted for rotating it relatively to the outer member 51.

The reference numeral designates an outer member and this member is cut away as at 61 to display the year table, the century disk and month disk heretofore mentioned. This member is also cut out as at 62 to provide a window through which the monthly datcvt-able may be displayed and adjacent to one edge, preferably the upper edge, there are a plurality of divisions 63 which bear the abbreviations of the days of the week and with which the columns of the monthly date table are adapted to coincide. The outer member G0 is further provided with a. window 65 and it is through this window 65 that the two year wheels 50 and 51 are visible and the member 65 is provided with a slot G6 through which the instrument heretofore mentioned for turning the year disk 50 is inserted. The member 60 is further cut out as at 67 and it is through this cut out portion that the month disk 19 heretofore mentioned is visible.

Thus it will be seen that when the device is used in the ordinary manner of a calendar the month wheel will be positioned so that the current month may be observed through the out out portion 67. The two members 50 and 51 will be so positioned that the year ot' the century will be visible through the sight opening (55. the century disk being set with relation to the year in the year table and the month disk being set with relation to the century disk. Upon positioning the month disk with respect to the century disk the monthly date table will be automatically positioned with respect to the abbreviations for the days of the week.

An example will be given:

Assuming that the calendar is to be used for the month of March, 1929. To set the calendar for this month the tab 16 of the century disk is moved so that the century 1900 registers with that column which includes 29. This is the position in which the century disk is shown in the drawings, i. e., with the century 1900 positioned in registration with the column next to the extreme righthand column of the yea-r table, in which is included the year 29. The month disk `is now moved so that the month of March coincides with the tab `16 of the century disk. This is the posit-ion in which the month disk is shown. Upon movement of the month disk toV this position. the monthly date table -is automatically moved so that the numeral 1 in the righthand set of numerals carried by the monthly date table falls under the abbreviation F :tor Friday, thus indicating that March 1, 1929 will fall on Friday. After this has been done the two members 50 and 51 are set to display the numerals 29 in the window 65, it being understood that the current century is printed on the outer member adjacent the window 65, as shown in the drawings and the month wheel 19 is turned to display the month of March in the cut-out portion 67.

From the foregoing, it will be seen that the calendar is capable of use for any month of any century, its limitations depending only upon `the printed matter of the various disks.

The calendar herein depicted is capable of visibly computing all of the various problems of which the device shown in the foregoing patent is ca able. In addition it has advantages over t e calendar shown in the foregoing patent, the principal advantage being that in the foregoing calendar the abbreviations of the days of the week in the column c of the disk C were movable and were not always positioned in theconventional form, that is, with the first column designating Sunday and the seventh column designating Saturday as iny an ordinary calendar, for example, if the rst day of the month fell on Friday as in the problem illustrated in the present device instead of the monthly date table being positioned relatively to a movable scale to engage the days of the week, the days of the week would be movable relative to the monthly date table and instead of S being positioned over the extreme lefthand column as in Figure 1, of the aforementioned patent, the abbreviation F would be placed thereover. This is as heretofore stated a departure from the conventional form of calendar and has caused confusion in the use of the calendar discussed in the aforementioned patent.

It will be apparent that the present arrangement of the several parts leaves considerable space available on the front of the calendar for the display of advertising or other desirable matter. In some instances however where it may be desirable, the sevral parts may be so arranged as to be operable from the rear thus leaving the entire front face free for advertising or other matter.

From the foregoing it is apparent that the present invention provides a new and improved type of perpetual calendar and while the present application discloses one form in which the invention may be carried out it is to be understood that various other forms may be resorted to without departing from the spirit of the invention as set forth in the appended claims. For example the monthly date table may be carried by a disk which would be rotated through the medium of the month disk instead of reoiprocated thereby and in view of these various changes, of which the device is capable, we do not wish the invention to be limited to the specific form and construction thereof herein shown.

ers whereby the slide, rack and pinion are permitted free movement within the cut-outs, but are prevented from displacement which would cause the teeth of the pinion and rack to slip over one another.

2. A perpetual calendar coi'nprising a table having numbers from 0 to 99 arranged in columns such that the numbers of the years in a century which have the same calendar are in the same column, a member mounted for reciprocating movement adjacent said table having the numbers of the centuries arranged in columns thereon adapted to align with the year columns on said table and havingk in the same column the centuries for which the calendar is the same, a second member mounted for reciprocating movement adjacent the first named reciprocating member and in a direction parallel thereto, a third reciprocating member having the numbers from 1 to 31 arranged in rows of 7 repeated, means connecting the second and the third reciprocating members so that movement of the second from one column aligning position to the next causes a movement of the third member the width of one column of numbers, and a screen adjacent said third member adaptedto remain stationary while said third member is moved and having an opening therein adapted to expose only seven columns of numbers at one time and symbols adjacent said opening indicating days of the week'and adapted to align each with a column of numbers.`

3. A perpetual calendar comprising a fixed table having the year numbers from 0 to 99 arranged in 7 columns, the numbers of years having the same calendars from March to December being in the same columns, a reciprocable member having the numbers ofv centuries arranged in seven different columns, the numbers of centuries having the same calendar from March 1st of the century year beingk arranged in the same columns and the columns being adapted to align with columns of the fixed table, a second reciprocable member having the twelve months of each year and January and February of leap year arranged in seven diii'erent columns, each adapted to be aligned with any one of the century columns, and a third reciprocable member having the days of the month from 1 to 31 arranged as on the conventional calendar in rows of seven numbers and repeated so as to form rows of at least l3 consecutive numbers of which at least six are also in the. row above, and a connection between the seeond and third reciprocable members such that movement of the second from one column aligning position to the next causes movement of the third member the width ot' one column of numbers, and a screen over said third member having an aperture adapted to eX- pose seven columns ot numbers and symbols representing the days ot the week adjacent said aperture adapted to align with the columns ot numbers on said third reciprocable member.

L A perpetual calendar comprisingr three members each movable with respect to the other two and having tabulated thereon respeetivel)v the months, the ,vears and the eenturies in columns adapted to be aligned with columns on the other members, a sereen having an aperture and a fourth member movable relative to the other two and to the screen and having the numbers l to 31 arranged thereon in columns and rows such that when it is moved relative to the screen the width ot one column et numbers at a time there will always be 31 consecutive numbers in seven columns exposed through the aperture.

5. A Calendar as defined in claim 4 which also includes a connection between one ot the first named three movable members and the fourth named member whereby when the tormer is moved from one column aligning position to t-he next the latter will be moved with relation to the screen the width ot one column ot numbers.

6. A calendar as defined in claim 4 in which the fourth-named movable member is rectangular and the aperture is also rectangular.

7. A calendar as defined in claim 4 in which the movable members are all of sheet material and the screen is a part of a laminated support having spaces therein formed by eut-outs from the laminations thereof, and at least some of the movable members are mounted in said spaces.

Signed at Tahiti, Societ)7 Islands, this {ifteenth dag.Y of October 199.8.

J. FRAIK STIMSON.

Signed at Ne York, New York, this 14th day ot November 1928.

TALBOT PATRICK. 

